This paper studies the problems related to the location management strategies, i.e., Location Area Based, Movement Based, and Timer Based for Wireless network s . The simulation models are based on user motion and call arrival is based on Poisson arrival process. The Timer - based Location Management strategy is one in which the user updates its location periodically after an interval of time. This time is based upo n the user’s mobility. The scheme seeks to minimize the average signaling cost for individual mobile users for both paging and registration. In the adaptive Location Area Based strategy, the user updates its location on each Location Area (LA) call boundar y crossing. In this case the LA size is adaptive changing according to the user’s mobility characteristics. In the Movement Based Location strategy, the user keeps track of the number of LA calls boundary and updates when the number exceeds a predefined va lue.
Sulaiman Yakhlef, (5-2013)

, (0-2015)

Ad Hoc networking allows portable devices to establish communication independent of a central infrastructure. The issue of routing in a mobile ad hoc network becomes a challenging task since the mobile nodes are free to move randomly. There are several ad hoc routing protocols, such as Ad hoc On-Demand Distance Vector (AODV), Dynamic Source Routing (DSR), Optimized Link State Routing (OLSR) and Zone Routing Protocol (ZRP), which propose solution for routing within a mobile ad hoc network. In this paper the ad hoc routing protocol AODV is used and modified to examine the interconnection between a mobile ad hoc network and the Internet, for this purpose Network Simulator 2 (NS-2) has been used. Moreover, three proposed approaches for gateway discovery are simulated.
Sulaiman Khalifa Yakhlef, Nasaraldian Ambark Shashoa, (10-2013)